diff --git a/src/dom/token_list.zig b/src/dom/token_list.zig
index 42e1c73a..4dae7b67 100644
--- a/src/dom/token_list.zig
+++ b/src/dom/token_list.zig
@@ -49,7 +49,7 @@ pub const DOMTokenList = struct {
             return parser.DOMError.Syntax;
         }
         for (token) |c| {
-            if (std.ascii.isWhitespace(c)) return error.InvalidCharacter;
+            if (std.ascii.isWhitespace(c)) return parser.DOMError.InvalidCharacter;
         }
     }